reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # clang-22 might not be officially released. Try a lower version if installation fails.
        # https://github.com/tobetter/linux/commit/804dbb7299c970e3cb07ee5eac596f8ca42f620d
        git remote add tobetter https://github.com/tobetter/linux
        git fetch --no-tags tobetter odroid-6.16.y
        git checkout 804dbb7299c970e3cb07ee5eac596f8ca42f620d
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-22 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-22 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash